11.108IA diesel engine has a compression ratio of 20:1 with an inlet of 95 kPa, 290 K,state 1, with volume 0.5 L. The maximum cycle temperature is 1800 K. Find themaximum pressure, the net specific work and the thermal efficiency.Solution:Compression process (isentropic) from Eqs.8.33-34T₂ T₁(v₁/v₂)k-1-290 x 2004-961 K1.4.P₂=95x(20)-1W2U₂-U₁ Co( T₂-T₁)-0.717 (961-290)-481.1 kJ/kgCombustion at constant P which is the maximum presssure=6297.5 kPa; V₂v₁/20=RT₁/(20 P₁) = 0.043805P3-P₂-6298 kPa; V3 V₂ T3/T2-0.043805 x 1800/961 -0.082052W3 P (V3-V₂) 6298 x (0.08215-0.043805)-241.5 kJ/kg293U3-U2+2W3=h3-h2=Cpo(T3-T₂)-1.004(1800-961)=842.4Expansion process (isentropic) from Eq.8.33T4 T3(V3/V4)04-1800 (0.08205/0.8761) 0.4-698 KAP3W4 U3-U4 Co(T3-T4)=0.717 (1800-698)-790.1 kJ/kgCycle net work and efficiencyW,net 2W3+3W4+ 1W2=241.5 +790.1-481.1=550.5 kJ/kgn-Wnet/9H-550.5/842.4-0.653ATNA

To find: The maximum pressure, net work, and thermal efficiency. Given: The compression ratio is…

A diesel engine has a compression ratio of 20:1 with an inlet of 95 kPa, 290 K, state 1, with volume 0.5 L. The maximum cycle temperature is 1800 K. Find the maximum pressure, the net specific work and the thermal efficiency.

A diesel engine has a compression ratio of 20:1 with an inlet of 95 kPa, 290 K, state 1, with volume 0.5 L. The maximum cycle temperature is 1800 K. Find the maximum pressure, the net specific work and the thermal efficiency.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

An air standard engine has a compression ratio of 20na cut-off ratio of 5. If the intake air pressure andtemperature are 100 kPa and 27 deg C, find the work inkJ per kg.
H.W1 A diesel engine has a compression ratio of 20:1 with an inlet of 95 kPa, 290 K, with volume 0.0005 m³. The maximum cycle temperature is 1800 K. Find the maximum pressure, the net work done and the thermal efficiency
A diesel engine has a compression ratio of 20:2 with an inlet of 90 kPa, 170C, state 1, withvolume 0.5 L. The maximum cycle temperature is 1900 K. Find the maximum pressure, the netspecific work and the thermal efficiency. (full solution pls)
The reheat pressure effect the operating variables and thus turbine performance. Repeat Problem 2 twice, using 0.6 and 1.0 MPa for the reheat pressure For the engine find W and ?? .
Consider an air standard Diesel cycle. At the beginning of compression, the temperature is 300 K and the pressure is 101.35 kPa. If the compression ratio is 15 and during the process 1860 kJ/kg of air as added as heat, calculate the following: The maximum cycle pressure a. 3726 kPa b. 1109 kPa The maximum cycle temperature a. 1680 K b. 2740 K The thermal efficiency of the cycle a. 55% b. 50% .The MEP a. 2600 kPa b. 800 kPa c. 5890 kPa d. 4495 kPa c. 60% d. 45% c. 3300 K d. 4050 K c. 1300 kPa d. 2900 kPa
Q3:A small truck has #cylinder ,4 liter compression ignition engine that operates on ir standard Dual cycle with air fuel ratio of 16:1, the compression ratio is 17 and the cylinder diameter is 14.5Cm. At the start of compression stroke Ta=50'C and Pa=100 kpa .It can be assumed the half of the heat input is added at constant volume and halt at constant pressure Calculate: 1-Temperature and pressure at each state of the cycle. 2-Indicated thermal efficiency. 4:28 PM
In an ideal Diesel engine, compression is from 14.7 psia, 80 ∘ F, 1.43 f t^3 to 500 psia. Then 16 BTU/cycle are added as heat. If k=1.42, find the heat efficiency of the cycle, heat rejected, and the net hp output for 300 cycles/min.
Q3:A small truck has #cylinder ,4 liter compression ignition engine that operates on irstandard Dual cycle with air fuel ratio of 16:1, the compression ratio is 17 and the cylinderdiameter is 14.5Cm. At the start of compression stroke Ta=5O'C and Pa=100 kpa .It can beassumed the half of the heat input is added at constant volume and halt at constant pressureCalculate:-Temperature and pressure at each state of the cycle. -Indicated thermal efficiency.
For a pressure ratio of r, specific heat ratio of y. the thermal efficiency of Brayton cycle is given by nen-1 Nen-1
Q2) Air at 300 K and 100 kPa enters into the compressor of a gas turbine engine that operates on a Brayton cycle. The air mass fl ow rate is 5 kg/s and the maximum air temperature in the engine is 1200 K. If the pressure ratio of the cycle is (r = 4), a. Find the effi ciency of the engine, assuming ideal compression and expansion. b. Find the power output for( case a). e. What would be the isentropic efficiency of each device that would result in no work output from the engine if the compressor and turbine were not ideal? d. What are the exit temperatures from the turbine and the compressor for that case.
A diesel engine has a compression ratio of 15 and heat addition at constant pressure . And the air standard efficiency of the engine is 60%. find the cut off ratio . Take y for air as 1.4.
Gas compression and expansionSketch the cycle as well as determine the Qcycle and Q31 in kj